For a geometric sequence, it is known that a1= 3 and an/an-1= 2, where n is any whole number greater than 1. What is the third term in the sequence? a A.5 B.6 C.7 D.12​

Arandom number generator is used to model the patterns of animals in the wild this type of study is called

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?